That's not true, Fizz (Quebecor) allows/allowed (not sure if they still do) reusing old sims.https://forum.fizz.ca/en/discussion/2628288/how-to-reuse-an-old-sim-cardhttps://www.reddit.com/r/FizzMobile/comments/p2muqq/psa_its_possible_to_reuse_an_old_...
